Figure 4 in Evolutionary systematics of the viviparous gastropod Sermyla (Gastropoda: Cerithioidea: Thiaridae), with the description of a new species

Figure 4. Shape differences of populations of S. riquetii, S. carbonata and S. kupaensis. Principle component analysis (PCA) for the configuration of 15 landmarks of S. kupaensis from Sulawesi, S. riquetii from Bali, Vietnam and Thailand, S. cf. riquetii from Australia, as well as S. carbonata in the different drainage systems of Australia. Five-pointed star: syntype of S. riquetii; nine-pointed star: syntypes of S. carbonata; six-pointed stars: syntypes of M. venustula; triangle tip down: holotype of S. prognata.